Your mobile phone is much more than WhatsApp, photos and social networks: hidden beneath the screen Tons of little-known Android tricks that can completely change how you use it every day. From secret codes to hidden menus, and including advanced security, accessibility, battery, camera, and productivity features, the system has an arsenal of options that almost no one takes advantage of.
Based on official Google recommendations and the Best “hacks” distributed across different layers of AndroidWe'll explore both basic and advanced features: privacy and anti-theft protection, secret menus with USSD codesWriting shortcuts, split screen, private space, camera tricks, notification management, Wi-Fi via QR code, smart battery, Easter eggs, and much more. Get ready, because by the time you finish reading, you'll know your Android much better than before.
Privacy, security, and hidden system tricks
Android has become a very robust system in terms of security, but in addition to what's visible in the settings there are Hidden layers and special codes that give you a lot of control about what happens inside your device.
Starting with the basics, it's worth opening the section Security and privacy Go to settings and check the panel that shows the phone's general "status": camera and microphone access, screen lock, Play Protect, accounts, etc. If you see anything in orange or red, the system suggests What should you change to strengthen security?, from activating a strong PIN to reviewing apps with excessive permissions.
In the same section you can manage more privacy on the lock screenIt's possible to only see the sender and not the content of the notifications, or to hide them altogether. This is perfect if you often leave your phone face up on the table or if you share an apartment and don't want others to see your notifications. your messages will be visible to anyone.
Another key adjustment is the ability to revoke access to camera and microphone at onceAndroid includes a global switch (in Security & Privacy > Privacy Controls) that blocks the use of the camera or microphone at the hardware level, even if an app has permission. When you disable it, the system acts as if those sensors don't exist, which is very useful if you suspect an app or work with sensitive information.
You can also play with precise locationIn each app's permissions, you can allow it to know only your approximate area, without telling it your exact street. For example, for a weather app, it doesn't matter if it knows your city, but it should know your building address and the time of day.
Advanced protection and anti-theft features in the latest Android versions
In the most recent versions of the system, Google is deploying a Advanced protection built into Android Designed for high-risk profiles (journalists, activists, public officials, etc.), but useful for anyone who wants to protect their account. By activating it from Security and privacy > Advanced protection, your Android automatically strengthens several aspects: it forces the use of secure connections, limits the installation of apps from unknown sources, reinforces phishing filters in Chrome, and provides better protection. your Google account logins and data.
In addition to this, there is a very interesting improvement: the advanced theft protectionAndroid allows the phone to lock itself if it detects a sudden pull or suspicious movement (for example, if it's snatched from your hand and someone runs away), in addition to tightening the conditions for changing your account password or disabling the screen lock when the device is being used in an untrusted environment.
Don't forget to adjust the functions as well. Unlock on trusted sitesFrom Security and privacy > More security and privacy > Extend unlock time, you can mark safe places (your home, for example) or trusted devices (your watch, your car) so your phone doesn't constantly ask for your PIN. However, it's best to use this only in environments where you truly control who has physical access to the device.
AI-protected calls against scams
One very striking new feature in modern Android is the protections in AI-assisted callsThe system can monitor, locally on the device, if during a conversation someone is asking you for bank details, verification codes, or trying to guide you step by step to make a suspicious transfer.
In those cases, the phone itself launches you On-screen alerts warning that you may be the victim of a scamor even blocks certain dangerous actions. Importantly, this analysis happens on the phone itself, without sending the audio to external servers, so the privacy of your conversations is maintained.
Secret codes and hidden menus to get to know your mobile phone inside and out
In addition to the visible menus, almost all Androids understand a series of special USSD codes that are dialed on the dial pad And they don't appear anywhere. There are hundreds, but some of the most useful ones that have become popular are:
- * # * # * # * # 4636This opens a menu with detailed device information: battery status (temperature, approximate cycles), usage statistics, mobile and Wi-Fi network data, and even radio details. It's a quick way to check If your battery is degrading or if you're having coverage problems.
- * # 0 * # (usually works on many Samsung phones): displays a test panel where you can test the screen, speakers, sensors, camera, vibration… Ideal for checking a second-hand phone or verifying if something has stopped working properly.
- * # # 2222: in some models it shows the hardware version, so you can see if the phone is really new or reconditionedThere is a similar code to check firmware (*#1234# on certain manufacturers).
- * # # 06This displays the IMEI number, which is essential if you want to block the device after it's been stolen. It's a good idea to write it down on a piece of paper outside the phone so you always have it handy.
- * # * # * # * # 8351: activates a system on some devices to record the last 20 calls. listen to recent conversationsBe aware that there may be legal implications; you need permission from the other party in many countries.
There are also codes to do deeper resets than a factory resetCommands like *#*#7780#*#* or *2767*3855# erase data, apps, and in some cases force a system reinstallation. Only use them if you know exactly what you're doing and always after a complete backup, because once executed, there's no going back.
Developer options: performance, RAM, and advanced tricks
Beneath the surface, Android hides a very powerful menu designed for developers, but which anyone can take advantage of. squeeze out a performance boost or fine-tune the detailsThis menu is not visible by default.
To activate it, go to Settings > About phone and tap several times in a row on Build Number until the system notifies you that you are a developer. Then you will see a new section (sometimes in System, sometimes in Additional Settings) called Developer options.
There's a lot to unpack in this menu, but it's best to use it judiciously. One of the most appreciated adjustments for the average user is reducing the scale of window animations, transitions, and durationIf you set them to 0,5x or even disable them, all system transitions speed up and the phone feels much smoother, especially on older devices.
Some manufacturers also hide audio settings here, such as the activation of High-quality Bluetooth codecs (LDAC, aptX HD, etc.)If your phone and headphones support them, you'll notice a clear improvement when listening to music: more detail, better instrument separation, and less compression.
Another very technical but relevant adjustment is the management of the wake locksThese mechanisms prevent the phone from entering deep sleep mode. Modern Android automatically identifies apps that abuse these blocks, but in Developer Options you can see which apps are keeping the CPU or radio awake and take action: uninstall them, restrict background battery usage, or look for less power-hungry alternatives.
Increase virtual RAM and high-performance mode
Many manufacturers have incorporated a feature of RAM expansion using internal memoryIt's usually called Increase RAM, Memory Extension, or something similar, and you'll find it in Additional Settings or in your phone's system settings. What it does is reserve part of the storage to use as virtual RAM.
If you usually have many apps open at the same time, you'll notice fewer reloads; but in return You lose storage space and slightly increase power consumptionThere's no point in activating it at maximum if your phone is running low on internal memory; ideally, you should find a middle ground.
In addition, some mobile phones include a high performance mode Within the battery settings. When you activate it, the processor is unleashed, certain background limitations are reduced, and the system reacts faster, at the cost of faster battery life and a slight increase in temperature. It's a useful option for demanding games or specific moments when you need all the available power.
Productivity, notifications, and multitasking at another level
Android has been filled with small features designed to make you use your mobile phone. in a more productive and less chaotic wayMany have been there for a long time and simply go unnoticed.
To begin with, you have the internal search enginesIn the app drawer, typing an app's name is faster than searching page by page. And in Settings, there's a search bar that saves you from navigating through endless menus: type "smart battery," "dark mode," or "silent notifications," and the system takes you directly to the specific setting.
Another piece of jewelry that few people use is the notification historyIf you enable this feature in Settings > Notifications > Notification History, your phone will save all alerts that have appeared in the status bar. If you accidentally delete one or can't remember which app was bothering you, you can go there and see an organized list of everything that's arrived.
Speaking of notifications, it's worth taming them: in Settings > Notifications > App notifications, you can decide which apps can notify you and howMany apps have various types of notifications (messages, promotions, reminders, etc.), and you can keep only the important ones, silencing the rest. Furthermore, you can completely hide the silent notification block so your status bar doesn't become a cluttered mess.
In the Conversations section you can assign priority to certain chats So your messages stand out and always arrive with sound, while others fade into the background. Ideal for differentiating between your important contacts and groups that only send memes.
History, screen pinning, and distraction-free mode
If you're someone who often lends out their phone, the feature of Screen fix It's essential. It's activated in Security and privacy > More security and privacy > Pin apps. Once turned on, from the recent apps view you can "pin" a specific app: while it's pinned, the phone won't let you exit it without entering your PIN or biometric unlock.
There is also the Guest Mode or additional usersThis feature is accessible in System > Users. You can create a completely separate profile, with its own desktop and apps, so that another person can use the phone without accessing your content. It's more cumbersome to manage than screen pinning, but much more comprehensive if you frequently share your phone.
In terms of concentration, in Digital Wellbeing there is a function called Distraction-free mode Concentration Mode. It lets you select which apps are "blocked" for a while or at a specific time (for example, social media and games during your workday), so you're not bombarded with notifications while you're trying to get work done or study.
Multitasking: split screen, text and images without opening apps
Android's multitasking is more complex than it seems. On the recent apps screen, in addition to switching between them, you can activate split screen modeTap an app icon and choose Split screen; that app will stay on top, and you can choose another one for the bottom. It works great for taking notes while watching a video, having your browser and email open at the same time, or following a chat while checking a map.
If there's a combination you use a lot (for example, YouTube + notes), there are phones that let you save paired apps to always open that pair in split mode with a single touch.
Previews of recent apps also allow select text without opening the applicationSimply tap and hold on visible text in the thumbnail or use the Select button below: you can copy, translate, or search Google for what you've selected. Something similar happens with images: in some layers, tapping the image icon on a thumbnail opens Google Lens to analyze the photo, copy it, save it, or search for related information.
Extreme customization: interface, accessibility, and gestures
One of the great virtues of Android is how easy it is to use. make your mobile phone something truly yours without installing too many extra things. The latest versions of the system have placed great emphasis on visual customization and accessibility.
To begin with, the eternal debate: light or dark modeIn Settings > Display, you can activate dark mode, which, in addition to changing the appearance, usually saves battery on OLED screens and reduces eye strain at night. It can be scheduled to turn on and off at specific times.
The Wallpaper and Style section allows the interface to take the colors of your wallpaper and apply them to buttons, menus, and even themed icons. You can accept the palette suggested by Android or choose manual combinations. By activating the option to thematic icons, you will give the desktop a much more uniform look.
Nor should we forget accessibility: in Settings > Accessibility there are options such as text to speech output (so that the mobile phone reads aloud what appears on the screen), increased font size, spot screen magnification, high contrast, or even notification alerts through flashes of the flash or changes in color on the screen instead of sound.
In navigation you can choose between the classic mode of three buttons (Back, Home, and Recents) or full-screen gestures. For those coming from iOS or modern skins, the gestures feel very natural: swipe from the sides to go back, from the bottom to go home, and hold to open multitasking. In addition, some skins allow you to adjust the sensitivity of the back gesture to prevent accidental taps.
Another very useful trick is the one hand modeThis feature is accessible from Accessibility > System Controls. When activated, a specific gesture (such as swiping down the gesture bar) reduces the interface to a corner, making it easier to reach everything with your thumb on large phones.
Private space, cloned apps, and hidden files
If you share your phone with your partner, family, or also use it for work, Android offers several ways to separate digital lives without needing to carry two phones.
Android 15 has enhanced the private spaceIt's an "app drawer within the app drawer" that you access with a different PIN or fingerprint, and you can even link it to another Google account. There you can install duplicate or different apps compared to your main profile, keep them hidden from the regular list, and decide when that space is automatically locked.
Many brands also include the option of clone apps Popular apps (WhatsApp, Instagram, Facebook, etc.) can be accessed from Settings > Apps > Dual App or Dual Messenger. This allows you to use two accounts simultaneously, perfect if you want to separate work and personal life without relying on unreliable third-party apps.
Regarding photos and sensitive documents, each manufacturer offers its own solution: Samsung has the Secure FolderXiaomi uses hidden folders in its file manager, and generally, the trick is to rename a folder starting with a period so that many gallery apps don't scan it. The goal is to prevent your private files from appearing when you view any photo.
WiFi, data, Nearby and Quick Share
La connectivity This is another area where Android flexes its muscles with little-known features that make your life much more comfortable day by day.
One of the most practical is to share the WiFi via QR codeFrom Settings > Network & Internet > Internet, enter the network you're connected to and tap Share. Your phone will display a QR code that any other Android device can scan to connect instantly without entering a password. There's usually also an option to share via Nearby.
Speaking of this, Nearby Share (and its evolution, Quick Share, within the Google ecosystem) allow you to send files wirelessly between nearby devices, even without a direct internet connection. Simply activate the feature in Settings > Google > Devices and sharing > Nearby Share, choose your visibility, and then, when sharing a photo or document, select that option. It's incredibly fast for transferring videos, photos, or PDFs between Android phones or with your Chromebook.
If you want to go a step further, some developer options let limit download bandwidth on Wi-Fi. This helps prevent a large download or update from your mobile device from overloading your home network, disrupting smooth streaming for other devices. The setting is usually called Network Download Rate Limit and allows you to cap the maximum speed your phone will use.
Battery: refresh rate, smart modes, and fast charging
Battery life remains a major concern, and Android is increasingly incorporating tools to address it. stretch those milliamps as much as possible without becoming obsessed.
On mobile phones with fast screens, one of the allies is the adaptive refresh rateIn Settings > Display & Brightness > Refresh Rate, you can let the panel increase to 90/120 Hz when needed (scrolling, animations, games) and drop to 60 Hz or lower for static content. This balances smoothness and power consumption without you having to manually adjust it all the time.
The Battery menu usually includes a section for Battery usage where you not only see screen time since the last charge, but also which apps are using the most resources. If you see an app that's consuming a huge percentage in the background, you can restrict or uninstall it. Android also learns from your habits with the smart batteryAnalyze which apps you use least so you can put them into deep sleep mode and prevent them from unnecessarily draining resources.
In critical moments you can resort to the classic energy savingsIt reduces brightness, limits animations, cuts background activity, and reduces syncing. Turning it on when you're short on battery and there's no power outlet nearby can make the difference between making it through the day or not.
And if you want to recharge as quickly as possible, there's a simple trick: activate airplane mode while chargingBy disconnecting Wi-Fi, Bluetooth, mobile network, and other radios, the phone has fewer things to power, and energy goes more directly to the battery. It doesn't work miracles, but it does give you a few minutes' head start on most devices.
Camera, photos, editing and playing with Easter eggs
Your Android camera is a small computer dedicated to taking photos, and it comes with quite a few features. advanced modes and tools that are underutilizedBeyond the automatic mode, it's worth trying HDR for scenes with lots of light and shadows, night mode for low-light photos, portrait mode for blurring backgrounds, and panoramas for landscapes.
Another classic trick involves Use the headphone volume buttons as a remote trigger This feature is available on many phones. You connect the cable, open the camera app, and when you press the volume up or down button, the app takes a photo. Perfect for more stable selfies or group photos without having to struggle with the timer.
Regarding screenshots, Android allows record screen You can record your screen without external apps, directly from the quick settings using the Screen Recording option. You can choose whether to record system audio, microphone audio, or both, and enable screen taps. This is even possible in Android 15. record only the content of a specific apppreventing notifications or passwords external to that application from being seen.
And, of course, we can't forget the Easter eggsEach Android version hides a small game or animation in Settings > About phone > Android version: if you tap and hold it repeatedly, the logo for that version usually appears, and sometimes minigames. In Chrome, when you're offline, the famous dinosaur that jumps over cacti appears with just a touch of the screen. Also, if you have ARCore, there are apps like Just a Line that let you draw in the air using augmented reality and save your creations.
With all these tricks, hidden menus, secret codes, and fine-tuning options, it becomes clear that Android is a much deeper system than it first appears: from protecting your privacy and preventing scams with the help of AI to maximizing battery life, controlling performance, customizing the interface down to the millimeter, creating private spaces, mastering multitasking, or getting the most out of the camera, you have a wealth of possibilities at your disposal. giant toolbox which, when used properly, transforms the mobile phone into something much more powerful, secure, and convenient than the typical "device for chatting and taking photos."
